Neck pain and emotional state in cervical spondylosis: A dual trajectory model analysis

Table 7 Parameter estimation results of Short-Form McGill Pain Questionnaire affective item score trajectory

Groups	Parameters	Estimated value	SE	T value	P value
Low	Intercept	1.238	0.112	11.017	< 0.001
	Linear	-1.193	0.104	-11.437	< 0.001
	Quadratic curve	0.209	0.022	9.603	< 0.001
	Cubic curve	-0.010	0.001	-8.132	< 0.001
Medium	Intercept	4.069	0.089	45.869	< 0.001
	Linear	-1.212	0.069	-17.593	< 0.001
	Quadratic curve	0.210	0.014	14.549	< 0.001
	Cubic curve	-0.010	0.001	-12.287	< 0.001
High	Intercept	6.764	0.137	49.355	< 0.001
	Linear	-0.846	0.121	-6.962	< 0.001
	Quadratic curve	0.151	0.026	5.916	< 0.001
	Cubic curve	-0.007	0.001	-5.102	< 0.001
Group members (%)
Low		31.428	2.536	12.408	< 0.001
Medium		52.161	2.628	19.838	< 0.001
High		16.411	1.779	9.224	< 0.001